A comparative study of photo-assisted deposition of silver nanoparticles on TiO2.

A comparative study of photo-assisted deposition of silver nanoparticles on TiO2.

Journal of nanoscience and nanotechnology (2013-08-02)

E Albiter, Z Hai, S Alfaro, H Remita, M A Valenzuela, C Colbeau-Justin

摘要

Noble metals deposited on TiO2 act as electron traps facilitating electron-hole separation and promoting the interfacial electron transfer process. In particular, silver nanoparticles have the ability to absorb visible light due to localized surface plasmon resonance. Here we report a photochemical and photocatalytic method for depositing Ag nanoparticles (2-20 nm) on TiO2 by using UV light at room temperature. UV-Vis diffuse reflectance spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and time-resolved microwave conductivity were used as characterization techniques. The photocatalytic activity was investigated by measuring the decomposition of rhodamine B under UV and visible light irradiation. The fastest bleaching of RhB under visible-light irradiation has been obtained by Ag/TiO2 plasmonic photocatalyst prepared by the photocatalytic route. These results were explained in terms of the more efficient photon absorption due to the presence of the surface plasmon resonance.

材料

货号

品牌

产品描述

718467

Sigma-Aldrich

氧化钛（IV）, nanopowder, 21 nm primary particle size (TEM), ≥99.5% trace metals basis

637254

Sigma-Aldrich

氧化钛 (IV)，锐钛矿, nanopowder, <25 nm particle size, 99.7% trace metals basis

735825

Sigma-Aldrich

银, conductive paste

576832

Sigma-Aldrich

银, nanopowder, <100 nm particle size, contains PVP as dispersant, 99.5% trace metals basis

14027

Sigma-Aldrich

氧化钛（IV）, puriss., meets analytical specification of Ph. Eur., BP, USP, 99-100.5%

232033

Sigma-Aldrich

氧化钛 (IV)，锐钛矿, powder, 99.8% trace metals basis

224227

Sigma-Aldrich

钛 (IV) 氧化物，金红石型, powder, <5 μm, ≥99.9% trace metals basis

14021

Sigma-Aldrich

氧化钛（IV）, ReagentPlus^®, ≥99%

248576

Sigma-Aldrich

氧化钛 (IV)，锐钛矿, powder, −325 mesh, ≥99% trace metals basis

637262

Sigma-Aldrich

钛 (IV) 氧化物，金红石型, nanopowder, <100 nm particle size, 99.5% trace metals basis

634662

Sigma-Aldrich

氧化钛(IV)，金红石和锐钛矿混合物, nanopowder, <100 nm particle size (BET), 99.5% trace metals basis

327085

Sigma-Aldrich

银, powder, 2-3.5 μm, ≥99.9% trace metals basis

484059

Sigma-Aldrich

银, nanopowder, <150 nm particle size, 99% trace metals basis

265500

Sigma-Aldrich

银, powder, <250 μm, 99.99% trace metals basis

327077

Sigma-Aldrich

银, flakes, 10 μm, ≥99.9% trace metals basis

700347

Sigma-Aldrich

氧化钛(IV)，金红石和锐钛矿混合物, nanoparticles, <150 nm particle size (volume distribution, DLS), dispersion, 40 wt. % in H₂O, 99.5% trace metals basis

204730

Sigma-Aldrich

钛 (IV) 氧化物，金红石型, 99.995% trace metals basis

327026

Sigma-Aldrich

银, wire, diam. 0.5 mm, 99.9% trace metals basis

204757

Sigma-Aldrich

钛 (IV) 氧化物，金红石型, ≥99.98% trace metals basis

327093

Sigma-Aldrich

银, powder, 5-8 μm, ≥99.9% trace metals basis

677469

Sigma-Aldrich

氧化钛（IV）, contains 1% Mn as dopant, nanopowder, <100 nm particle size (BET), ≥97%

265527

Sigma-Aldrich

银, foil, thickness 0.1 mm, 99.9% trace metals basis

85131

Sigma-Aldrich

银, colloidal, 65-75% Ag basis

327107

Sigma-Aldrich

银, powder, <45 μm, ≥99.99% trace metals basis

265586

Sigma-Aldrich

银, wire, diam. 0.5 mm, ≥99.99% trace metals basis

265608

Sigma-Aldrich

银, wire, diam. 1.0 mm, 99.9% trace metals basis

303372

Sigma-Aldrich

银, granular, >250 μm, 99.99% trace metals basis

327050

Sigma-Aldrich

银, shot, 1-3 mm, ≥99.99% trace metals basis

267430

Sigma-Aldrich

银, wire, diam. 2.0 mm, ≥99.99% trace metals basis

327034

Sigma-Aldrich

银, wire, diam. 0.25 mm, ≥99.99% trace metals basis